package cambridge.parser;

/**
 * This is a utility to test the characters within the document if they are in valid
 * character range for an XML document.
 */
class CharUtil {
   private static int[][] BASE_CHARS = new int[][]{
      {0x0041, 0x005A},
      {0x0061, 0x007A}, {0x00C0, 0x00D6}, {0x00D8, 0x00F6}, {0x00F8, 0x00FF}, {0x0100, 0x0131},
      {0x0134, 0x013E},
      {0x0141, 0x0148}, {0x014A, 0x017E}, {0x0180, 0x01C3}, {0x01CD, 0x01F0}, {0x01F4, 0x01F5},
      {0x01FA, 0x0217}, {0x0250, 0x02A8}, {0x02BB, 0x02C1}, {0x0386, 0x0386}, {0x0388, 0x038A},
      {0x038C, 0x038C}, {0x038E, 0x03A1}, {0x03A3, 0x03CE}, {0x03D0, 0x03D6}, {0x03DA, 0x03DA},
      {0x03DC, 0x03DC}, {0x03DE, 0x03DE}, {0x03E0, 0x03E0}, {0x03E2, 0x03F3}, {0x0401, 0x040C},
      {0x040E, 0x044F}, {0x0451, 0x045C}, {0x045E, 0x0481}, {0x0490, 0x04C4}, {0x04C7, 0x04C8},
      {0x04CB, 0x04CC}, {0x04D0, 0x04EB}, {0x04EE, 0x04F5}, {0x04F8, 0x04F9}, {0x0531, 0x0556},
      {0x0559, 0x0559}, {0x0561, 0x0586}, {0x05D0, 0x05EA}, {0x05F0, 0x05F2}, {0x0621, 0x063A},
      {0x0641, 0x064A}, {0x0671, 0x06B7}, {0x06BA, 0x06BE}, {0x06C0, 0x06CE}, {0x06D0, 0x06D3},
      {0x06D5, 0x06D5}, {0x06E5, 0x06E6}, {0x0905, 0x0939}, {0x093D, 0x093D}, {0x0958, 0x0961},
      {0x0985, 0x098C}, {0x098F, 0x0990}, {0x0993, 0x09A8}, {0x09AA, 0x09B0}, {0x09B2, 0x09B2},
      {0x09B6, 0x09B9}, {0x09DC, 0x09DD}, {0x09DF, 0x09E1}, {0x09F0, 0x09F1}, {0x0A05, 0x0A0A},
      {0x0A0F, 0x0A10}, {0x0A13, 0x0A28}, {0x0A2A, 0x0A30}, {0x0A32, 0x0A33}, {0x0A35, 0x0A36},
      {0x0A38, 0x0A39}, {0x0A59, 0x0A5C}, {0x0A5E, 0x0A5E}, {0x0A72, 0x0A74}, {0x0A85, 0x0A8B},
      {0x0A8D, 0x0A8D}, {0x0A8F, 0x0A91}, {0x0A93, 0x0AA8}, {0x0AAA, 0x0AB0}, {0x0AB2, 0x0AB3},
      {0x0AB5, 0x0AB9}, {0x0ABD, 0x0ABD}, {0x0AE0, 0x0AE0}, {0x0B05, 0x0B0C}, {0x0B0F, 0x0B10},
      {0x0B13, 0x0B28}, {0x0B2A, 0x0B30}, {0x0B32, 0x0B33}, {0x0B36, 0x0B39}, {0x0B3D, 0x0B3D},
      {0x0B5C, 0x0B5D}, {0x0B5F, 0x0B61}, {0x0B85, 0x0B8A}, {0x0B8E, 0x0B90}, {0x0B92, 0x0B95},
      {0x0B99, 0x0B9A}, {0x0B9C, 0x0B9C}, {0x0B9E, 0x0B9F}, {0x0BA3, 0x0BA4}, {0x0BA8, 0x0BAA},
      {0x0BAE, 0x0BB5}, {0x0BB7, 0x0BB9}, {0x0C05, 0x0C0C}, {0x0C0E, 0x0C10}, {0x0C12, 0x0C28},
      {0x0C2A, 0x0C33}, {0x0C35, 0x0C39}, {0x0C60, 0x0C61}, {0x0C85, 0x0C8C}, {0x0C8E, 0x0C90},
      {0x0C92, 0x0CA8}, {0x0CAA, 0x0CB3}, {0x0CB5, 0x0CB9}, {0x0CDE, 0x0CDE}, {0x0CE0, 0x0CE1},
      {0x0D05, 0x0D0C}, {0x0D0E, 0x0D10}, {0x0D12, 0x0D28}, {0x0D2A, 0x0D39}, {0x0D60, 0x0D61},
      {0x0E01, 0x0E2E}, {0x0E30, 0x0E30}, {0x0E32, 0x0E33}, {0x0E40, 0x0E45}, {0x0E81, 0x0E82},
      {0x0E84, 0x0E84}, {0x0E87, 0x0E88}, {0x0E8A, 0x0E8A}, {0x0E8D, 0x0E8D}, {0x0E94, 0x0E97},
      {0x0E99, 0x0E9F}, {0x0EA1, 0x0EA3}, {0x0EA5, 0x0EA5}, {0x0EA7, 0x0EA7}, {0x0EAA, 0x0EAB},
      {0x0EAD, 0x0EAE}, {0x0EB0, 0x0EB0}, {0x0EB2, 0x0EB3}, {0x0EBD, 0x0EBD}, {0x0EC0, 0x0EC4},
      {0x0F40, 0x0F47}, {0x0F49, 0x0F69}, {0x10A0, 0x10C5}, {0x10D0, 0x10F6}, {0x1100, 0x1100},
      {0x1102, 0x1103}, {0x1105, 0x1107}, {0x1109, 0x1109}, {0x110B, 0x110C}, {0x110E, 0x1112},
      {0x113C, 0x113C}, {0x113E, 0x113E}, {0x1140, 0x1140}, {0x114C, 0x114C}, {0x114E, 0x114E},
      {0x1150, 0x1150}, {0x1154, 0x1155}, {0x1159, 0x1159}, {0x115F, 0x1161}, {0x1163, 0x1163},
      {0x1165, 0x1165}, {0x1167, 0x1167}, {0x1169, 0x1169}, {0x116D, 0x116E}, {0x1172, 0x1173},
      {0x1175, 0x1175}, {0x119E, 0x119E}, {0x11A8, 0x11A8}, {0x11AB, 0x11AB}, {0x11AE, 0x11AF},
      {0x11B7, 0x11B8}, {0x11BA, 0x11BA}, {0x11BC, 0x11C2}, {0x11EB, 0x11EB}, {0x11F0, 0x11F0},
      {0x11F9, 0x11F9}, {0x1E00, 0x1E9B}, {0x1EA0, 0x1EF9}, {0x1F00, 0x1F15}, {0x1F18, 0x1F1D},
      {0x1F20, 0x1F45}, {0x1F48, 0x1F4D}, {0x1F50, 0x1F57}, {0x1F59, 0x1F59}, {0x1F5B, 0x1F5B},
      {0x1F5D, 0x1F5D}, {0x1F5F, 0x1F7D}, {0x1F80, 0x1FB4}, {0x1FB6, 0x1FBC}, {0x1FBE, 0x1FBE},
      {0x1FC2, 0x1FC4}, {0x1FC6, 0x1FCC}, {0x1FD0, 0x1FD3}, {0x1FD6, 0x1FDB}, {0x1FE0, 0x1FEC},
      {0x1FF2, 0x1FF4}, {0x1FF6, 0x1FFC}, {0x2126, 0x2126}, {0x212A, 0x212B}, {0x212E, 0x212E},
      {0x2180, 0x2182}, {0x3041, 0x3094}, {0x30A1, 0x30FA}, {0x3105, 0x312C}, {0xAC00, 0xD7A3}

   };

   private static int[][] DIGITS = new int[][]{
      {0x0030, 0x0039}, {0x0660, 0x0669}, {0x06F0, 0x06F9}, {0x0966, 0x096F}, {0x09E6, 0x09EF},
      {0x0A66, 0x0A6F}, {0x0AE6, 0x0AEF}, {0x0B66, 0x0B6F}, {0x0BE7, 0x0BEF}, {0x0C66, 0x0C6F},
      {0x0CE6, 0x0CEF}, {0x0D66, 0x0D6F}, {0x0E50, 0x0E59}, {0x0ED0, 0x0ED9}, {0x0F20, 0x0F29}
   };

   public static boolean isLetter(int c) {
      for (int[] ints : BASE_CHARS) {
         for (int i = ints[0]; i <= ints[1]; i++) {
            if (c == i) return true;
         }
      }
      return false;
   }

   public static boolean isDigit(int c) {
      for (int[] ints : DIGITS) {
         for (int i = ints[0]; i <= ints[1]; i++) {
            if (c == i) return true;
         }
      }
      return false;
   }

   public static boolean isName(int c) {
      return c == ':' || c == '_' || CharUtil.isLetter(c);
   }

   public static boolean isNameChar(int c) {
      //Letter | Digit | '.' | '-' | '_' | ':'
      return c == '.' || c == '-' || c == '_' || c == ':' || isLetter(c) || isDigit(c);
   }
}
